In the Green500 the systems of the TOP500 are ranked by how much computational performance they deliver on the HPL benchmark per Watt of electrical power consumed. This electrical power efficiency is measured in Gigaflops/Watt. This ranking is not driven by the size of a system but by its technology and the ranking order looks therefor very different from the TOP500. The computational efficiency of a system tends to slightly decrease with system size, which among technologically identical system gives smaller system the advantage. Here are the top 10 of the Green500 ranking:
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The system to claim the No. 1 spot for the GREEN500 is for a second time the JEDI - JUPITER Exascale Development Instrument at EuroHPC/FZJ in Germany. The system has 19,584 total cores, an HPL benchmark of 4.5 PFlop/s, and achieved an efficiency of 72.7 GFlops/Watt. JEDI is a BullSequana XH3000 system with Grace Hopper Superchip 72C 3GHz, NVIDIA GH200 Superchip, and Quad-Rail NVIDIA InfiniBand NDR200.
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In the second place is the ROMEO-2025 system at the ROMEO HPC Center - Champagne- Ardenne in France. With 47,328 total cores and an HPL benchmark of 9.863 PFlop/s, and achieved an efficiency of 70.9 GFlops/Watt. The architecture of this system is identical to the No. 1 system JEDI, but as it is more than twice as large its energy efficiency is slightly lower.
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The No. 3 spot was taken by the new Adastra 2 system at the Grand Equipement National de Calcul Intensif - Centre Informatique National de l'Enseignement Superieur (GENCI-CINES) in France. This is a HPE Cray EX255a system with AMD 4th Gen EPYC 24 core 1.8GHz processors, AMD Instinct MI300A accelerator, and Slingshot-11, running RHEL. With 16,128 cores total it achieved 2.529 PFlop/s HPL performance and an efficiency of 69.1 GFlops/Watt.
The data collection and curation of the Green500 project has been integrated with the TOP500 project. This allows submissions of all data through a single webpage at http://top500.org/submit.
| Rank |
TOP500 Rank |
System |
Cores |
Rmax (PFlop/s) |
Power (kW) |
Energy Efficiency (GFlops/watts) |
| 1 |
224 |
JEDI - BullSequana XH3000, Grace Hopper Superchip 72C 3GHz, NVIDIA GH200 Superchip, Quad-Rail NVIDIA InfiniBand NDR200,
ParTec/EVIDEN
EuroHPC/FZJ
Germany
|
19,584 |
4.50 |
67 |
72.733 |
| 2 |
122 |
ROMEO-2025 - BullSequana XH3000, Grace Hopper Superchip 72C 3GHz, NVIDIA GH200 Superchip, Quad-Rail NVIDIA InfiniBand NDR200, Red Hat Enterprise Linux,
EVIDEN
ROMEO HPC Center - Champagne-Ardenne
France
|
47,328 |
9.86 |
160 |
70.912 |
| 3 |
442 |
Adastra 2 - HPE Cray EX255a, AMD 4th Gen EPYC 24C 1.8GHz, AMD Instinct MI300A, Slingshot-11, RHEL,
HPE
Grand Equipement National de Calcul Intensif - Centre Informatique National de l'Enseignement Suprieur (GENCI-CINES)
France
|
16,128 |
2.53 |
37 |
69.098 |
| 4 |
155 |
Isambard-AI phase 1 - HPE Cray EX254n, NVIDIA Grace 72C 3.1GHz, NVIDIA GH200 Superchip, Slingshot-11,
HPE
University of Bristol
United Kingdom
|
34,272 |
7.42 |
117 |
68.835 |
| 5 |
51 |
Capella - Lenovo ThinkSystem SD665-N V3, AMD EPYC 9334 32C 2.7GHz, Nvidia H100 SXM5 94Gb, Infiniband NDR200, AlmaLinux 9.4,
MEGWARE
TU Dresden, ZIH
Germany
|
85,248 |
24.06 |
445 |
68.053 |
| 6 |
18 |
JETI - JUPITER Exascale Transition Instrument - BullSequana XH3000, Grace Hopper Superchip 72C 3GHz, NVIDIA GH200 Superchip, Quad-Rail NVIDIA InfiniBand NDR200, RedHat Linux and Modular Operating System,
ParTec/EVIDEN
EuroHPC/FZJ
Germany
|
391,680 |
83.14 |
1,311 |
67.963 |
| 7 |
69 |
Helios GPU - HPE Cray EX254n, NVIDIA Grace 72C 3.1GHz, NVIDIA GH200 Superchip, Slingshot-11,
HPE
Cyfronet
Poland
|
89,760 |
19.14 |
317 |
66.948 |
| 8 |
371 |
Henri - ThinkSystem SR670 V2, Intel Xeon Platinum 8362 32C 2.8GHz, NVIDIA H100 80GB PCIe, Infiniband HDR,
Lenovo
Flatiron Institute
United States
|
8,288 |
2.88 |
44 |
65.396 |
| 9 |
340 |
HoreKa-Teal - ThinkSystem SD665-N V3, AMD EPYC 9354 32C 3.25GHz, Nvidia H100 94Gb SXM5, Infiniband NDR200,
Lenovo
Karlsruher Institut für Technologie (KIT)
Germany
|
13,616 |
3.12 |
50 |
62.964 |
| 10 |
49 |
rzAdams - HPE Cray EX255a, AMD 4th Gen EPYC 24C 1.8GHz, AMD Instinct MI300A, Slingshot-11, TOSS,
HPE
DOE/NNSA/LLNL
United States
|
129,024 |
24.38 |
388 |
62.803 |
